标题： 初始状态部分子扩展和能量损失在RHIC的d+Au中被探测 显示英文标题

标题： Initial State Parton Broadening and Energy Loss Probed in d+Au at RHIC

摘要： 碰撞参数和快速度依赖性对于无质量π介子在RHIC的$d+Au$反应中在$\sqrt{s}_{NN}=200$GeV下的Cronin效应是在核靶上的pQCD多重弹性散射框架中计算的。 我们引入一种形式化方法以在微扰计算中包括初始态能量损失，并除了部分子的横向动量展宽之外，还考虑了弹性能量损失。我们认为Cronin效应的中心性依赖性可以区分RHIC上不同的强子产生情景。 其大小和快速度依赖性被证明包含了关于冷核物质性质的重要实验信息，直到中等和大$x$反阴影/EMC区域。 显示英文摘要

摘要： The impact parameter and rapidity dependence of the Cronin effect for massless pions in $d+Au$ reactions at $\sqrt{s}_{NN}=200$ GeV at RHIC is computed in the framework of pQCD multiple elastic scattering on a nuclear target. We introduce a formalism to incorporate initial state energy loss in perturbative calculations and take into account the elastic energy loss in addition to the transverse momentum broadening of partons.We argue that the centrality dependence of the Cronin effect can distinguish between different hadron production scenarios at RHIC. Its magnitude and rapidity dependence are shown to carry important experimental information about the properties of cold nuclear matter up to the moderate- and large-$x$ antishadowing/EMC regions.